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vertical angle

noun, Geometry
1.
one of two opposite and equal angles formed by the intersection of two lines.
Origin of vertical angle
1565-1575
1565-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for vertical angles

vertical angles

plural noun
1.
(geometry) the pair of equal angles between a pair of intersecting lines; opposite angles Also called vertically opposite angles
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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vertical angles in Science
vertical angles
  (vûr'tĭ-kəl)   
Two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word Value for vertical

13
16
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